Inflatable football helmet



FIG. 1 is a front elevation view of an inflatable football helmet showing my new design;

FIG. 2 is a right side elevation view thereof; the left side elevation is a mirror image of the right side;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof, and,

FIG. 6 is a bottom perspective view thereof. 

The ornamental design for an inflatable football helmet, as shown and described. 